I have the Blackheart components. If I did it again, I would get the Speedway swap kit since it is almost the same as the Blackheart. Appears to be on backorder though...
https://www.speedwaymotors.com/1967-...it,487640.html
Looks like you can get the parts separately for less...but reading the reviews it looks like they may have 'recalled' the engine mounts. Probably why they are out of stock. I bet they show backordered so they can improve them before selling more...
https://www.speedwaymotors.com/1967-...ck,445271.html
https://www.speedwaymotors.com/1967-...er,474035.html
These must be the engine mounts in their kit, but you can cross reference and get some for cheaper. I went with inexpensive rubber mounts instead of the Blackheart urethane engine mounts:
https://www.speedwaymotors.com/1998-...de,405798.html